a-a a-b a-c aaa aab aac aad aae aah aau ab- aba abb abc abd abe abh abu ac- aca acb acc acd ace ach acu ad- ada adb adc add ade adh adu aea aeb aec aed aee aeh aeu aha ahb ahc ahd ahe ahh ahu au- aua aub auc aud aue auh b-u baa bab bac bad bae bah bau bba bbb bbc bbd bbe bbh bbu bca bcb bcc bcd bce bch bcu bda bdb bdc bdd bde bdh bdu be- bea beb bec bed bee beh beu bha bhb bhc bhd bhe bhh bhu bua bub buc bud bue buh buu c-- caa cab cac cad cae cah cau cba cbb cbc cbd cbe cbh cbu cca ccb ccc ccd cce cch ccu cda cdb cdc cdd cde cdh cdu ce- cea ceb cec ced cee ceh ceu ch- cha chb chc chd che chh chu cua cub cuc cud cue cuh cuu daa dab dac dad dae dah dau dba dbb dbc dbd dbe dbh dbu dca dcb dcc dcd dce dcu dda ddb ddc ddd dde ddh ddu de- dea deb dec ded dee deh deu dh- dha dhb dhc dhd dhe dhh dhu dua dub duc dud due duh eaa eab eac ead eae eah eau eba ebb ebc ebd ebe ebh ebu ec- eca ecb ecc ecd ece ech ecu ed- eda edb edc edd ede edh edu eea eeb eec eed eee eha ehb ehc ehd ehe ehh ehu eu- eua eub euc eud eue haa hab hac had hae hah hau hba hbb hbc hbd hbe hbh hbu hca hcb hcc hcd hce hch hda hdb hdc hdd hde hdh hdu he- hea heb hec hed hee heh heu hha hhb hhc hhd hhe hhh hhu hua hub huc hud hue huh huu ua- uaa uab uac uad uae uah uau uba ubb ubc ube ubh ubu uca ucb ucc ucd uce uch ucu uda udb udc udd ude udu uea ueb uec ued uee ueh uha uhb uhc uhd uhe uhh uhu uua uuc uue uuu